<script setup>
import { userRegisterService } from '@/api/user.js'
import { User, Lock } from '@element-plus/icons-vue'
import { ref, watch } from 'vue'
import { useUserStore } from '@/stores'
import { useRouter } from 'vue-router'
import { ElMessage } from 'element-plus';
const isRegister = ref(false)
const form = ref()

// 整个的用于提交的form数据对象
const formModel = ref({
    username: '',
    password: '',
    repassword: ''
})
// 整个表单的校验规则
// 1. 非空校验 required: true      message消息提示，  trigger触发校验的时机 blur change
// 2. 长度校验 min:xx, max: xx
// 3. 正则校验 pattern: 正则规则    \S 非空字符
// 4. 自定义校验 => 自己写逻辑校验 (校验函数)
//    validator: (rule, value, callback)
//    (1) rule  当前校验规则相关的信息
//    (2) value 所校验的表单元素目前的表单值
//    (3) callback 无论成功还是失败，都需要 callback 回调
//        - callback() 校验成功
//        - callback(new Error(错误信息)) 校验失败
const rules = {
    username: [
        { required: true, message: '请输入用户名', trigger: 'blur' },
        { min: 5, max: 10, message: '用户名必须是 5-10位 的字符', trigger: 'blur' }
    ],
    password: [
        { required: true, message: '请输入密码', trigger: 'blur' },
        {
            pattern: /^\S{6,15}$/,
            message: '密码必须是 6-15位 的非空字符',
            trigger: 'blur'
        }
    ],
    repassword: [
        { required: true, message: '请输入密码', trigger: 'blur' },
        {
            pattern: /^\S{6,15}$/,
            message: '密码必须是 6-15位 的非空字符',
            trigger: 'blur'
        },
        {
            validator: (rule, value, callback) => {
                // 判断 value 和 当前 form 中收集的 password 是否一致
                if (value !== formModel.value.password) {
                    callback(new Error('两次输入密码不一致'))
                } else {
                    callback() // 就算校验成功，也需要callback
                }
            },
            trigger: 'blur'
        }
    ]
}

const register = async () => {
    // 注册成功之前，先进行校验，校验成功 → 请求，校验失败 → 自动提示
    await form.value.validate()
    await userRegisterService(formModel.value)
    alert('注册成功')
    ElMessage.success('注册成功')
    //isRegister.value = false
}

const userStore = useUserStore()
const router = useRouter()
const login = async () => {
    await form.value.validate()
    const res = await userLoginService(formModel.value)
    userStore.setToken(res.data.token)
    ElMessage.success('登录成功')
    router.push('/')
}

// 切换的时候，重置表单内容
watch(isRegister, () => {
    formModel.value = {
        username: '',
        password: '',
        repassword: ''
    }
})
</script>

<template>
    <!-- 
    1. 结构相关
      el-row表示一行，一行分成24份 
       el-col表示列  
       (1) :span="12"  代表在一行中，占12份 (50%)
       (2) :span="6"   表示在一行中，占6份  (25%)
       (3) :offset="3" 代表在一行中，左侧margin份数

       el-form 整个表单组件
       el-form-item 表单的一行 （一个表单域）
       el-input 表单元素（输入框）
    2. 校验相关
       (1) el-form => :model="ruleForm"      绑定的整个form的数据对象 { xxx, xxx, xxx }
       (2) el-form => :rules="rules"         绑定的整个rules规则对象  { xxx, xxx, xxx }
       (3) 表单元素 => v-model="ruleForm.xxx" 给表单元素，绑定form的子属性
       (4) el-form-item => prop配置生效的是哪个校验规则 (和rules中的字段要对应)
  -->
    <el-row class="login-page">
        <el-col :span="12" class="bg"></el-col>
        <el-col :span="6" :offset="3" class="form">
            <!-- 注册相关表单 -->
            <el-form :model="formModel" :rules="rules" ref="form" size="large" autocomplete="off" v-if="isRegister">
                <el-form-item>
                    <h1>注册</h1>
                </el-form-item>
                <el-form-item prop="username">
                    <el-input v-model="formModel.username" :prefix-icon="User" placeholder="请输入用户名"></el-input>
                </el-form-item>
                <el-form-item prop="password">
                    <el-input v-model="formModel.password" :prefix-icon="Lock" type="password"
                        placeholder="请输入密码"></el-input>
                </el-form-item>
                <el-form-item prop="repassword">
                    <el-input v-model="formModel.repassword" :prefix-icon="Lock" type="password"
                        placeholder="请输入再次密码"></el-input>
                </el-form-item>
                <el-form-item>
                    <el-button @click="register" class="button" type="primary" auto-insert-space>
                        注册
                    </el-button>
                </el-form-item>
                <el-form-item class="flex">
                    <el-link type="info" :underline="false" @click="isRegister = false">
                        ← 返回
                    </el-link>
                </el-form-item>
            </el-form>

            <!-- 登录相关表单 -->
            <el-form :model="formModel" :rules="rules" ref="form" size="large" autocomplete="off" v-else>
                <el-form-item>
                    <h1>登录</h1>
                </el-form-item>
                <el-form-item prop="username">
                    <el-input v-model="formModel.username" :prefix-icon="User" placeholder="请输入用户名"></el-input>
                </el-form-item>
                <el-form-item prop="password">
                    <el-input v-model="formModel.password" name="password" :prefix-icon="Lock" type="password"
                        placeholder="请输入密码"></el-input>
                </el-form-item>
                <el-form-item class="flex">
                    <div class="flex">
                        <el-checkbox>记住我</el-checkbox>
                        <el-link type="primary" :underline="false">忘记密码？</el-link>
                    </div>
                </el-form-item>
                <el-form-item>
                    <el-button @click="login" class="button" type="primary" auto-insert-space>登录</el-button>
                </el-form-item>
                <el-form-item class="flex">
                    <el-link type="info" :underline="false" @click="isRegister = true">
                        注册 →
                    </el-link>
                </el-form-item>
            </el-form>
        </el-col>
    </el-row>
</template>

<style lang="scss" scoped>
.login-page {
    height: 100vh;
    background-color: #fff;

    .bg {
        background: url('@/assets/logo2.png') no-repeat 60% center / 240px auto,
            url('@/assets/login_bg.jpg') no-repeat center / cover;
        border-radius: 0 20px 20px 0;
    }

    .form {
        display: flex;
        flex-direction: column;
        justify-content: center;
        user-select: none;

        .title {
            margin: 0 auto;
        }

        .button {
            width: 100%;
        }

        .flex {
            width: 100%;
            display: flex;
            justify-content: space-between;
        }
    }
}
</style>
